Royalty In The Shade of Purple

[Copster]

what is the thought on older tahoes going to synthetic when its at 225xxx miles and you dont know if it has ever had synthetic oil? i have heard that once you use it you cant go back because of the seals.

---------- Post added at 08:45 PM ---------- Previous post was at 08:44 PM ----------

what do you guys think about using synthetic oil in a tahoe 5.7 with 225xxx miles and you dont know if it has ever had any? i have heard that if you use it and go back it may hurt the seals. what do you think?

 

[SunlitComet]

236k and own switching to mobile 1 synthetic Next
week.

Sent from HTC EVO mobile

 

[ChiTahoe]

what is the thought on older tahoes going to synthetic when its at 225xxx miles and you dont know if it has ever had synthetic oil? i have heard that once you use it you cant go back because of the seals.

---------- Post added at 08:45 PM ---------- Previous post was at 08:44 PM ----------

what do you guys think about using synthetic oil in a tahoe 5.7 with 225xxx miles and you dont know if it has ever had any? i have heard that if you use it and go back it may hurt the seals. what do you think?

It makes no difference, you can use it whenever you want.

I run valvoline full synthetic or ams oil when I get it. Currently I'm on valvoline full syn with 1 qt of mobil 1 dexron VI mixed in.

 

[99Yuk]

Currently I'm on valvoline full syn with 1 qt of mobil 1 dexron VI mixed in.

Wait! What?
I was with you until I saw the Dexron mixed in.... Isn't that tranny fluid? You put a qrt of tranny fluid in with your engine oil? What does that do for you? Clean up sludge? Run thinner? Thicker? How often does that stuff go in, every oil change?

 

[SunlitComet]

Helps with sticking lifters.

 

[AtomicHoe094]

trans fluid is a very good detergent and cleans as well

 

[NOVAhoe]

i finally got around to changing my oil with some mobil 1 full syn high mileage 10w30 and i cant even hear my engine running now except for the exhaust lol, i had a slight valve tick from the drivers side and its gone now!

lol sorry i was just excited, i got nothing better to do today since im sick

 

[AtomicHoe094]

Yea, occasionally ill run that Lucas oil additive as well.

 

[99Yuk]

trans fluid is a very good detergent and cleans as well

Helps with sticking lifters.

Thanks guys for the answers...now I know.

 

[moviewithnotitle]

Mobil 1 syn for me too. Switched it over in my hoe at 63k, currently at 136k with no issues. The oil actually comes out very clean even after 5k miles with changes.

On a related note, I switched my boat over after the 10hr breakin period to mobil1 syn. The oil in the boat comes out really clean after 100hrs. It's darker, but about the shade of dark honey. Truthfully I could just change the filter and be good, but with over 900hrs, I don't take chances like that. The boat motor is a marinized 2001 Chevy LT1 motor. Produces around 330hp. There are a lot of forums that protest the quality of syn oil over regular, and when your pushing weight like we are in a wakeboard boat (read 2000-3000lbs water ballast) it puts a strain on all the components, especially at high RPM's for a long duration of time. Syn is just a little extra insurance.